文献类型：期刊文献

中文题名：元谋干热河谷地区新银合欢天然更新的初步调查

英文题名：Natural regeneration of Leucaena leucocephala in Yuanmou dry-hot valley

作者：宗亦臣[1] 郑勇奇[1] 张川红[1] 段福文[2] 王志和[2]

第一作者：宗亦臣

机构：[1]中国林业科学研究院林业研究所;[2]云南省楚雄州林业科学研究所

年份：2007

卷号：26

期号：1

起止页码：135-138

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：国家科技部社会公益研究专项资助项目(2002DIB50122)

语种：中文

中文关键词：新银合欢;干热河谷;天然更新

外文关键词：Leucaena leucocephala; dry-hot valley; natural regeneration.

分类号：S718

摘要：通过2005年6和10月对元谋干热河谷地区新银合欢人工林的调查，发现新银合欢林下幼苗数量较多，经过对幼苗刨根后，发现林下的新银合欢幼苗均为种子实生苗，表明新银合欢是通过种子繁殖来完成天然更新。新银合欢单株结实量在602—1513粒，树体高大的结实量多；其林下幼苗生长良好，更新密度最低为368株·m^-2，最高达960株·m^-2；新银合欢林缘幼苗最远扩散距离为58．3m，幼苗的扩散范围主要集中在距离林缘10m的区域内，种子受风力和流水的影响，可以沿沟谷传播很远。
In this paper, an investigation was made on the Leucaena leucocephala plantations in Yuanmou dry-hot valley in June and October 2005. Under the plantations, there were a great many of seedlings, and all of them were generated from seeds, suggesting that L leucocephala could naturally regenerate from seed. The seed quantity per tree was from 602 to 1 513, and high trees had more seeds. The seedlings were growing well, with a minimum renewal density of 960 plants per square meter and a maximum renewal density of 960 plants per square meter. The longest dispersal distance of the seedlings was 58. 3 m from the edge of L leucocephala stand, and the dispersal range was mostly in an area 10 m from the stand. The seeds could be dispersed to a far distance along the valley by wind and running water.